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01-22-2014, 10:32 PM   #1
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tamron 500mm f8 help

i have just bought a tamron 500mm was supposed to be m42 thread it is not .it is close but my m42 adaptor will not screw on.if i measure it it does look like 42mm across is there possibly another adaptor i can use .i did see an m42 plus 75 but i am not sure what this means any help much appreciated or else i have thrown my money away

01-22-2014, 10:37 PM   #2
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Probably t-mount. M42 is 42x1mm t-mount is 42x.75mm thread. You will need an adapter to make it work. Get t-mount to k-mount no need for m42 in this case.
01-23-2014, 12:03 AM   #3
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t mount

i have a t mount comeing for it should be here in a couple of days took a chance with that so hopefully that will work.the other thing i was going to try i have an olr lens and i was thinking of trying to swap mounts but its a bit sloppy and the screws look stuffed thanks for your help
01-23-2014, 04:16 AM   #4
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QuoteOriginally posted by barryl Quote
i have just bought a tamron 500mm was supposed to be m42 thread it is not .it is close but my m42 adaptor will not screw on.if i measure it it does look like 42mm across is there possibly another adaptor i can use .i did see an m42 plus 75 but i am not sure what this means any help much appreciated or else i have thrown my money away
To the best of my knowledge, Tamron never produced a 500mm T2-mount prime lens. In fact, the only 500 mm prime lenses from Tamron that I know of are their Adaptall-2 mount mirror lenses (model 55B and 55BB).

So, may I suggest that you give us more information about brand and model number, such as you may read it directly on the lens itself.

01-23-2014, 06:43 PM   #5
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tamron-popular serial no 75261 1;8 f =500mm thats all it has on i bought the t2 on the chance it would fit the lens but it probably will not turn up till next week the other thing it has written on it is a m1 or i at the screw end for the camera thats all i can find on it.i bought the lens hopeing i could find the right adaptor for it the person who owned it reckon they got rid of it and could not remember what adaptor went with it
01-23-2014, 10:34 PM   #6
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no this is not mirror lens, long narrow black tube still made ( very similar looking) by Samyang in South Korea
01-23-2014, 11:17 PM   #7
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it has got made in japan not south korea basically the same lens glass is probably a bit better or worse
01-24-2014, 07:57 PM   #8
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QuoteOriginally posted by barryl Quote
it has got made in japan not south korea basically the same lens glass is probably a bit better or worse
absolutely, all old Tamrons were made in Japan but my latest one ( 18-270) is made in China........

01-24-2014, 11:09 PM   #9
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do you think an adaptall would work i no nothing about them
01-24-2014, 11:23 PM   #10
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QuoteOriginally posted by barryl Quote
do you think an adaptall would work i no nothing about them
what do you mean, your lens is from pre Adaptall time and need T mount adapter?
I have probably more than dozen Adaptall and Adaptall2 lenses and they all have very different base.
Have a look at:
adaptall-2.org
you might be able to find some info about your lens, but I thing that your lans comes from late 50ties so might not be there.
the longest tele with T mount I can see there is 450mm:
Google Translate
anyway have a look.......
01-24-2014, 11:29 PM   #11
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ok no worries i have the t adaptor comeing so i will see what happens thank for every ones help so far on this
01-24-2014, 11:33 PM   #12
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some info about mounts, inc T , T2 and TX verities :
SLR Lens Mount Identification Guide
01-25-2014, 12:21 AM   #13
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How about posting a photo of your lens to give us a hand with identifying the lens and its mount?
01-25-2014, 03:48 PM   #14
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hope this helps
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01-25-2014, 03:53 PM   #15
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